endchoice
+config BF_REV_MIN
+ int
+ default 0 if (BF52x || BF54x)
+ default 2 if (BF537 || BF536 || BF534)
+ default 3 if (BF561 ||BF533 || BF532 || BF531)
+
+config BF_REV_MAX
+ int
+ default 2 if (BF52x || BF54x)
+ default 3 if (BF537 || BF536 || BF534)
+ default 5 if (BF561)
+ default 6 if (BF533 || BF532 || BF531)
+
choice
prompt "Silicon Rev"
default BF_REV_0_1 if (BF52x || BF54x)